<nav>
    <ul>
        <li><a ui-sref="demo.pulldown" ui-sref-active="selected">下拉收起</a></li>
        <li><a ui-sref="demo.amount" ui-sref-active="selected">数量加减</a></li>
        <li><a ui-sref="demo.menu" ui-sref-active="selected">menu菜单</a></li>
        <li><a ui-sref="demo.wechat" ui-sref-active="selected">模拟微信语音播放</a></li>
    </ul>
</nav>
<div class="right-part" ui-view=""></div>